Valve for explosive-engines.



A. LEVEDAHL. VALVE FOB EXPLOSIVE ENGINES. nrmoulox 11mm :um 2a, 190s.

mw 1 y MM w 1@ Mw@ A LEVBDAHL VALVE FOB EXPLOSIVE ENGINES. ArPLloA'rxon funn JULY 2a, 190s.

lili??? l LEVEHJHL, AERRA. LINGIS, ASSIGNOR TO AURORA AUTOMATIC MA- GHINERE COMPLNY, OF' AURORA, ILLINOIS, A CORPORATION OF ILLINOIS.

PATENT OFFICE.

FOR EXPLOSIVEENGINES.

Speica.tion of Letters Patent.

ed July 3, 155GB.

l Lion oi the power cylinder of a gasolene motor :zml tho parts relating to my invention. Fig. 2 is n 'View in vertical cross-section of the motor and the parts comprising my inwnion, takvn on line 2-2 of Fig. 1. Fig. 3

iisrnl linproroniem in Valves for EX- is o detail View illustrating part1ally in elei ivolnffinef :nifl l flo l'iitfreby eclaire vnion und partially in cross-section, taken on lino 3-3 of Figfl, the parts for controllhzil ih@ following is ri fullv cloni'. sind exact ling the tension of thel exhaust valve sprlng.

iloscril'il'ion fhoreo i ro''vrrncef boing had to iho :iwoinpzinying iirziwinge. si! to ho leb lors rolirrnc nzirlfefl erm, which 'form n pim. of this sperifi 'aioir This imonion rola'es to iniproveiiiffnfa in f-sploaii iiginrf anni moree parioiilfuly to om: rivoli rolling ihn 'enioii ol liao giving whirh :mi mpg :imi oxhmnsi wives of' :moli an engi in Bastion, of the sparking cam and gear. Fig'. is :i detail plan view of the. vulve seat for flan intake valve. Fig. 6 is a detail plan rio-iv of they intake. valve seat and im arm by which 'lie tension of the intake valve spring i: Controlled.

As ilhisrncil in lille said drawings, 5 indicates the oxplosion cylinder of an internal combustion engine. 1Within the said cyliniofi io Close ihn inlet .les or Cvfplosivo Higinio; of the kind having Fig. 4. is n fragmentary Side View, with parts i556 iii'lol, wlw of ha :eliminatie fo, if'ha. im, (leer is .fi iiallon 6 of .1 familiar form with gli o opa lion in fue whioh is oonnevieil :i piston rod 7. A crank f y Closed anto #rising iS nltzu'hmlf to the lower end 'f the spring nii t ho oy'limflr. the Simili: being Composed of two ne "faire qniokl. mul motions and 9 which are provided with rib 25 l'. will' onough lo f-ru. 4 und groove connections :it their margins i'izril vl prompi 1 ig of tho volw. ro whore ilary fir@ joimd nml are Secured t0- qii: :in nociva' ole migrare 'om griller hij menno of holts l0, 10. vTn said i lo ogwn the inici'. inilv. or oooroi. mnnifrzwing arf lovzileil two parallel Crank polimi, 'ho hilo?, *mi lo romain upm: 5f.. I l .t ll nml Thix said frank disks,

'2o enough foi wr igmimxy of exp whirsh soi-W :is balance wheolg, are mounted'4l .o onli-r 1li@ ifi-'hilf upon sinh or Sectional shufls 'i3 and 14 which :iro axially ilinod and relatively supported milla of he ormik casing. A t a point flisant from their Supportin ih@ rmnl.' disks l1 and lf2 are unite inviamo? :1. frank pin l5. to which the Yor fn-.l of lha piston rod 7 Connected. i Similis lfr. 14 und l5 are tapered in i guu'venvhii h einer the Prank disks und openings i: miel lioks ure correspondl." iziporeil. lha smid Shnfs und disks be- Y lorhrfl I4 tether oy nirms "if nuts 16 u hir-h ongngo the sormv-thronded Mills of the i All fl )or wml flio cylinrlrr 5 is provided Homin-r QU through which the eX- ,.ixiurv is admitted to the cylinder mnmztiim (ii-minds are discharged. rhanihor 2i) exends into a laterally ,g inegml exg'ension on the uppr lwith internal screw-threads for port-ion of the cylinder, said extension being provided with upper and lower chambers 2l and 22. The upper of said chambers (denoted by 2l) forms the supply passage 'for the explosive mixture and opens into the chamber 20 through an admission port in the upper wall of the chamber. The said chamber 2l has in its side wall an inlet opening provided with internal screw-threads, for the attachment thereto of a supply pipe. The lower chamber :'22, which constitutes the exhaust passage for the combustion products, opens at its top into the chamber 20 through an exhaust port in the lower wall of the said chamber 20, and is provided with a lateral obliqiiely disposed neck forming an exhaust opening, and which is provided the attachment thereto of an exhaust pipe.

For opening and closingr the supply passage 21 there is provided an automatic valve, that is to say, one which is opened by the suction of the intake stroke of the piston and is automatically closed by a springe The disk 23 of the said valve is located in the 2O and bears upwardly against a valve seat ring 24 which is inserted inte the inlet port iii/.the horizontal wall tween the chambers 21 and 9.0., The said valve disk is'provided with a valve stem which extends upwardly therefrom through a cylindric guide 2.6 which is supported centrally on the valve seat ring by radial. arms. Surrounding the said valve stem a'coiled actuating spring 27. Said springbears upwardly against a flange 28 on collar 29 which is loosely mounted on the said valve stein, thesaid collar being pro vided in its upper side with opposite recesses engaged by the ends oi a stop pin 30 inserted transversely through the upper end of the yalve stem and which. limits the upward movement of the said collar on the said valve stein. The said springr 2T bears at its lower end against a n'ioving of the tension controlling means.

" "The exhaust chamber V22 is provided with an upwardly or inwardly facing valve seat 31 which surrounds the exhaust. port in the horizontal wall which separates the said exhaust chamber from the chamber 20. Fittin on said valve seat 3l is a valve diskv 32 which adapted to move upwardly or into the chamber 2O when the exhaust valve is opened. A valve stein 33 is attached to the valve disk and extends downwardly therefrom, through a guide passage pio ided in an upright guide tube 3f., i hich is inserted through and secured in the bot tom wall of the exhaust chamber. Below the lower end of the said guide tube 34 and loosely surrounding the valve stern 33, is a collar 35 which is adapted to vertically slide on said stein and isprovided with a recess in its upper portion adapted to receive the i'uechaiiisin noemer lower end of the said guide tube, on which said colla-r also vertically slides. Surroundingthe valve stern 33, 35, and adapted to bear upwardly thereon is a coiled actuating spring 36 which bears at its lower end upon a flanged collar 37. The said ilanged coller 37 `is loosely mounted with respect to the said valve stein by means of a stop pin 38 inserted transversely through the said valve stem. v

The'niechanism for operating the exhaust valve of the engine is located in an auxiliary casingl 40 secured to the section 9 of the crank casing by means of screws 41, 41 and is constructed as follows: Secured to the outer end of the shaft .14 of the crank disk 12 is a gear wheel 42. A second gear wheel 43, which is driven from the said gear wheel 42, is rotatively mounted upon a shaft 44 which is supported atits inner end upon the wall of the section 9 of the crank casing and at its wall of, the auxiliary casing 40. by the said gear'wheel 43 is a cani which preferably inade integral therewith. Pivotaliy supported within the seid auxiliary casing` 40 is a horizontally arranged verticallyswinging lever 46 adapted to bear against. the lower end of the valve stein 33 which extends' downwardly through Carried disk a guide passage formed' in an upwardly exa tending tubular neck 48 made integral with Ythe top wall ot the auxiliary Casing 40. Pivbelowthe said collar outer end in an aperture in the otally supported on the said lever 46is an aiitifriction roller 47, with a portion thereof projecting below the said lever, said roller being adapted to engage the cam disk 43 which opera through the said lever 46 to litt the e; .S valve disk 32 from its seat.

For lilnii the lever 4G t.

e is provided a spring stop comprising an eiidwise movable plunger 50 mounted in the casing 40 with its inner end in po t rising and falling end of the said lever 46. Said plunger arranged in an inclined position and slides in a guide passage formed in a. piu. u1 which is inserted through and secure/l in a thickened part of. the wall of the casing Ll-. Said plugv is made adjustable in said wall by means of exterior serew threads on the plug which engage interior screw threads iii the opening in the wall through which it. is inserted. Surrounding a reduced. portion of the 'plunger 5G, which within the base ot the nlug 5l, is coiled actuating spriiinq which acts against the outer end wall of the pl' und an outwardly facing slionldei' on the plunger, to hold said plunger in contact with the end of said lever 46. which has a beveled end sui-face substantially at. right angles to the plunger.

'The tension'of the spring 2'? of the intake valve is automatically increased during the exhaust stroke of the engine piston and autothe downward movement of..

ion for contact with the ih@ @um disk "shin @inwoning Yi Whlch Ik: ini-,cried Hw l'vdmfvd 0nd of a wrak l by :1

by mums of a .j

shaft 80 and is adapted to be driven by the gear wheel 42 on the shaft G of the crank disk f. llpon the outwardly extending end Ai" die slnift 80 which extends beyond the L1( nnill bearing 8:2 and the retaining nut S3 is mounfd n Cznn disk 85 whirl'iis secured lo ele said slurf( and by menne of' which the ignition oirenii ifj eonlrolled.

Tlie (op wall of ille ennmlier Q1 is shown as provided .vitn n well known form of device lor resting the operation of (lie intake \.1l\ e, consisting of n plunger 86 arranged i ci licully'in line with and adapted to :iet on die upper end of die valve stem 25, said plunger being held normally at ille outward liinif of its nwvement by :i spring Si'.

l claim as my invention z ly An explosive engine7 comprising un inulre Valve adapted to be opened by suction, e. spring applied to close said intake valve` and means including; a member against which said. spring 41mistantly bears, operated by the engine, :or controlling ille tension of seid spring airing all of the strokes of the engine pis o, adapted to decrease the tension of Said ring by permitting the same to expand at "lie time of the suction stroke of the engine piston and increase the tension of said spring ,by compressing the seme during the remaining strokes of the engine piston.

2. An explosive engine Comprising ein exhaust valve, e spring applied to close said vulve, means for openingl said exhaust nlve against the notion of the spring, and means operated lfy tile engine for decreasing the neinml tension of the spring just preceding the 'time of the exhaust stroke und mainnnning lne ileereasr-l tension of the ,smid

spring dni-ing seid exlnnxst stroke of the,

engine pislnn.

An explosive engine uomprisingl :in inln; vfllw, n spring mlnpleil lo (-losu said ifiln vulve. nn exlxnnsi vulve. n spring :ujf iid to close snid en, musi vulve opernled lw tile engine for inereswinr :vani Y deerensing ille ension in idoli; or springs. mlnpea'l lo alvorens-v ille 'tension the inlnlxe vulve spx-ing (hiring llie stroke and lo inervnse lln lension of lle sume dnl-ing: tlie remaining sirenes of tin'- engine pison nini :liso :idnplml lo innemen ille norninl tension oi" llxe exlnuwl vzil'w `pring' :if n lime inst priwwling Ille @Ylnms slroln :ind to inninnin ille ini'exrml iension hiring ille 'riiiniininfg 'rolzns of' ine engine pinion,

fornire rowliisingf im in il ln' @winni ,fzox'nlwi wills on' surrounding? ,1 u if n n j slow l y inl;

snii inlet valise. :zn 'na-m upon whirl: mini spring re'ais :z fnlivise moraine rod lo bien :und erm is nlneiiell, and means o ennl ated by the engine in time with the piston stroke acting to decrease the tension of the spring during the suction stroke and to increase the tension in the said spring during the interveningr strokes of llie engine piston.

An explosive engine Comprising .fi power cylinder, n piston. ininlie und exlmnis( rnlies.; enuli einlnneing n vulve disk provided with n valve siem, :in endvvise infnn'ole rod arranged parallel Willi said valve stem und provided with tvvo laterally extending :1i-ins, (foiled springs surronmiing the said vulve stems and nearing severally against .seid arms, said disks being arranged to move toward enen oilier in the opening of The vulves, und the said springs .fueling in opposite directions lo elfee the closing of the valves. und means operated by the en gine giving endwise movement. to said rod, said rod being shifted in a direction to le crease the tension of the intake valve yspring; and to increase the tension of the. exlmnst stroke of the engine.

G. An explosive engine, a power a piston, an intake valve, n .spring to Close the said innke vulve, :in uxllenst valve, n spring' applied to close z-rzlnmst valve, means for opening said exhaust vi lie against the action of said ,e; ixi1i, Y :in endwise movable rod. provided Wisin info later ally projeeing arms against which lienr the springs of the intake sind exile st, valves, and means operated by ilie engine 'fine gir" ing.r endmife morrgnen, to said rod.

'e n explosive. engine compi power fylinder, :i *l sion, inlale and eximir-it valves@ enrli zi; ai :lieti embracing n vulve disli; prin rlilml will: n valve stron coiled springs sur rounding will valve Llm. :in kmlnfisr morl :1li-le :unl nrmnpged pnrellel .l1 smid mire strnn :unl zriovi'led niin l'vvo rigid ,firms wiring rshivll ienfif, zo si'nnly lo close lA d valle :in endwse rnmalile rod pro l vnied with ai, le' ral firm against which ille spring' heure. nini menant for gli? n ovnmenr, lo wiring l oelmlwl nv klm Iiinnl; izni'f f fnlwl ifo l me @minier imm-nien? in :no ofl. i

o nl www oi l i valve spring at the time of the suction eylinffier,

for controlling one 0f the ports of sn'ul cyhnder, embracmg a Y Ve (lxsk provxdwl Wlth a valve stem, n fx'ml collar on the salve stem, a cmlwl sp1-111g smroundmg mm1 valve Stem and bem-ing al one epd on said collar, sind Sprmg lemilulg to nl 'ays lmlxl the other end' of said sp1-111g. and means for i opcratmg sind rod from the crank Shaft x adapted to Shift the rod to change the nmmal tension of said spring at the. time of tlm sml'ou Stroke and th maintain Said. changed tension of the spring during the in wl'vcniug strokes of the engine piston.

In lesln'xony, tlml I claim the foregoing :ny my' nvcnlion l nfllx my Signature in the presume of two vfllrxcssvs, ths 16th (lay 0f July A. D. 1905.

AXEL LEVE DA H1 Witnesses 

